MorseLabBaseMorseLabBase

Translate Morse. Then practice it.

Free International Morse in your browser: text ↔ dots and dashes, with audio. Tune WPM and pitch; open the trainer when you want drills.

Runs in your browser·No signup·Works offline·Nothing leaves your device
文字
摩斯電碼
就緒中文使用標準電報碼（漢字 → 4 位數字 → 摩斯）。約 7 千字 · 與「播放」/「閃光」引擎相同。拉丁字母仍使用國際摩斯電碼。

Flash output follows your system "reduce motion" setting.

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Alphabet quick reference

Tap a character to hear its tone — useful when a letter looks right but still sounds wrong.

字母快速參考

點擊字母聽摩斯碼 · 數字與標點： 標點符號表

Click a letter to hear its Morse.

Practice next

Done with one conversion? Short drills for sight and ear.

Trainer Koch order + Farnsworth spacing drillsListening practice Copy random groups by earKeyer Send with spacebar or on-screen key timingAlphabet A-Z and 0-9 chart you can hear

A typical practice path

  1. 1
    Encode or decode above

    Type plain text, or paste dots and dashes. Play the tones, tweak WPM and pitch, copy either side.

  2. 2
    Hear individual letters

    Use the alphabet pad when a character looks familiar but still sounds wrong.

  3. 3
    Stay for practice

    Open the trainer or listening drills for Koch sets and copy-by-ear sessions.

Popular tools

TranslatorTrainerAlphabetSOSFlashlightAudio translator

What you get

Converter up front
Text ↔ Morse sits above the fold so you can finish a job without scrolling past a lecture.
Drills one click away
Koch / Farnsworth trainer, listening copy, and keyer when one conversion is not enough.
Stays on your device
No account, no upload. Install as a PWA for offline drills on the same phone or laptop.

Who it is for

LearnNew to CW? Hear a few letters on the alphabet pad, then try short trainer sessions.HamFarnsworth spacing and keyer timing without installing another desktop practice app.PuzzlePaste a clue, decode quietly, check SOS or a short phrase before you spoil the room.VisualFlash or vibrate the pattern when headphones are not an option — same timing engine.

About Morse code

Morse code represents letters, numbers and punctuation as short and long signals — dots (dits) and dashes (dahs). Amateur radio, aviation and emergency signalling still use it; SOS (... --- ...) is the best-known distress rhythm.

This site uses International Morse, so encode/decode here matches common charts. Type on the Text side to encode; paste dots and dashes (ASCII .- or ·—) on the Morse side to decode. Word gaps show as /.

No photo OCR and no license-exam coaching. For a full phrase as sound, use Play on the converter or the audio translator. For structured drills, open the trainer.

SOS··· ——— ···dit · dah · practice

Common questions

Is this International Morse or American Railroad Morse?

International Morse (ITU-style letters, digits, and common punctuation). If an old railroad chart disagrees, you are looking at a different alphabet.

Does my text leave this device?

No. Encode, decode, and audio run locally in your browser. There is no account and nothing is uploaded for translation.

Why isn’t sound playing?

Most browsers block autoplay. Click Play once after the page loads — that gesture starts Web Audio. Silence is usually a permission rule, not a broken tone.

What does WPM mean here?

Words per minute using the PARIS standard (dit length ≈ 1200 / WPM ms). Higher WPM shortens dits and dahs; pitch only changes the tone, not the timing.

Can I learn Morse here, or is this only a converter?

Both. The homepage opens on the converter. Trainer (Koch / Farnsworth), listening practice, and keyer are linked below for drills.

Is this for emergencies or a license exam?

No. Use it to practice and translate. Official training and emergency procedures live elsewhere.

Practice tool only. Audio and light stay in your browser — not a license exam or emergency certification.